Source of InvoiceFormatter.java

Structures and functions

  1: /**
  2:    This interface describes the tasks that an invoice
  3:    formatter needs to carry out.
  4: */
  5: public interface InvoiceFormatter
  6: {
  7:    /**
  8:       Formats the header of the invoice.
  9:       @return the invoice header
 10:    */
 11:    String formatHeader();

 13:    /**
 14:       Formats a line item of the invoice.
 15:       @return the formatted line item
 16:    */
 17:    String formatLineItem(LineItem item);

 19:    /**
 20:       Formats the footer of the invoice.
 21:       @return the invoice footer
 22:    */
 23:    String formatFooter();
 24: }